END序列下半参数回归模型估计的相合性

研究误差为END序列的半参数回归模型y_i=x_iβ+g(t_i)+σ_iε_i(i=1,2,…,n).应用加权估计与最小二乘估计方法,建立未知参数β和未知函数g的最小二乘估计与加权最小二乘估计的估计量.利用END序列的Rosenthal不等式以及截尾的方法证明p(p1)阶矩的相合性.     

鞅差误差下纵向数据半参数模型的均方相合性

文章考虑了误差为鞅差序列下的纵向数据半参数回归模型,基于广义最小二乘法和非参数权函数方法分别给出了模型中未知参数β和未知函数g(.)的估计,在适当条件下,证明了β和g(.)估计量的均方相合性。     

半参数EV模型二阶段估计的渐近正态性

考虑半参数EV模型 Yi =x′iβ+g(Ti)+ei,Xi =xi +ui,1≤i≤n,β∈Rp 为未知回归参数,g(·)为[0,1]上的未知Borel函数。利用近邻权函数并综合最小二乘法建立了参数的估计量,并研究了它们的渐近正态性。     

一类混合序列下半参数模型估计的强相合性

目的在混合随机误差下证明半参数回归模型参数估计的强相合性质。方法利用引理不等式及已给条件进行证明。结果证明了参数β的最小二乘估计和未知函数g(·)的非参数核估计是强相合的。结论半参数回归模型中的参数β和非参数函数g(·)的估计量在ρ混合误差下具有强相合性。     

α-混合误差下纵向数据半参数回归模型的均方相合性

考虑误差为α-混合序列下的纵向数据半参数回归模型,基于广义最小二乘法和非参数权函数方法分别给出了模型中未知参数β和未知函数g（·）的估计,在适当条件下,证明了β和g（·）的估计量的均方相合性．     

φ混合序列下半参数模型估计的相合性

研究误差序列为φ混合序列的半参数回归模型,利用φ混合序列的Rosenthal型不等式和截尾的方法,讨论参数β的最小二乘估计量和未知函数g(·)的非参数估计量的强相合性和r阶平均相合性.     

随机缺失情况下固定设计半参数回归模型的相合性

目的在随机缺失情况下证明固定设计半参数回归模型的强相合性。方法利用引理,一些不等式及已给条件进行证明。结果证明了参数β的最小二乘估计和未知函数g(.)的非参数核估计是强相合的。结论随机缺失下半参数回归模型中β的参数估计和非参数函数g(.)的估计量是强相合的。     

一类半参数模型的正交级数及最小二乘估计

考虑半参数回归模型Y_i=X_iβ+g(X_iβ)+e_i,i=1,…,n。用正交级数和最小二乘法构造了β和g的估计β和g,证明β和g的强相合性,并把此结果应用于截断回归模型=Xβ+e,e～F(未知)中未知参数β和误差分布F的估计.     

一类半参数回归模型中M估计的收敛速度

考虑半参数回归模型yi=xTiβ0+g(ti)+ei,i=1,2,…,n。其中,β0是未知参数,g是未知函数。当g的估计取一类非参数权估计(包括核估计和最近邻估计)时,文章讨论了参数β0的M估计β0的强收敛速度和未知函数g的估计g*n(t)的一致强收敛速度,从而得到β0-β0=O(n-1/2(logn)1/2)　a.s.和sup|g*n(t)-g(t)|=O(n1/3logn)　a.s.。0≤t≤1     

半参数回归模型的渐近正态性

考虑半参数回归模型 yi=x′β+g(ti)+ei,1≤i≤n ,选择近邻函数为权函数,应用最小二乘法得到β、g(·)和σ2 的估计,讨论参数σ2 估计量的渐近性质.     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with